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    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

CCS for tubes/valves: PCBs

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#290
After reading Walt Jungs excellent articles on current sources recently I wonder if these here ccs are very convenient compared to a cascoded ixys or DN fet.Ýou need more components plus they are three terminal requiring an extra connection?
 
#293
There have been almost 300 posts of hand-wringing about these simple little PC cards. Wouldn't it have been faster and easier for each user to simply hand draw the traces of this very simple circuit onto small blank PC cards with a "Sharpie", and then etch and drill them?

Sorry, as a curmudgeon, I had to ask....
 
#294
There have been almost 300 posts of hand-wringing about these simple little PC cards. Wouldn't it have been faster and easier for each user to simply hand draw the traces of this very simple circuit onto small blank PC cards with a "Sharpie", and then etch and drill them?
Click to expand...

Some of us do not have the chemicals on hand to etch or possibly the time or desire to do so.

Personally I have anxiously watched and waited for this to become reality. I am more than willing to pay a fair price for a good finished product. The guys have done a superior job in designing a compact and highly adaptable board and it would be nice to see it completed.

I'm still in for 5 sheets of 20 ea =100 boards
 
#295
Alright, I'll bite. Desire, OK. But, time? There's been time to write a lot of posts, right? Run down to your neighborhood Radio Shack (if you live in the US) and plunk down $5 for a bottle of this stuff. Stop by Wal-Mart on the way home, and buy a few Sharpie permanent marking pens with a sharp tip. You now have less than $10 into this. Grab some lunch on the way back to justify your trip. With materials at hand, in 1 to 2 hours you can have several little CCS boards, and the pride that you made them yourself. Once you've made simple PC cards this way, you'll find yourself doing it often for other circuits. Break the learning curve. But, word to the wise: wait till the wife has left the house for Christmas shopping to warm the etchant in her microwave, and don't get the stuff on anything unless you like the color of chocolate.

Radio Shack sells etchant
 
#296
Alright, I'll bite. Desire, OK. But, time? There's been time to write a lot of posts, right? Run down to your neighborhood Radio Shack (if you live in the US) and plunk down $5 for a bottle of this stuff. Stop by Wal-Mart on the way home, and buy a few Sharpie permanent marking pens with a sharp tip. You now have less than $10 into this. Grab some lunch on the way back to justify your trip. With materials at hand, in 1 to 2 hours you can have several little CCS boards, and the pride that you made them yourself. Once you've made simple PC cards this way, you'll find yourself doing it often for other circuits. Break the learning curve. But, word to the wise: wait till the wife has left the house for Christmas shopping to warm the etchant in her microwave, and don't get the stuff on anything unless you like the color of chocolate.
Click to expand...

Ok, I don't want to mess with it.

I would sooner have the pride of paying for some nice looking ready made boards. It looks like others feel the same way judging the interest to purchase the boards.
 
#299
Hi,

So, its this still a go or has it been shelved because of interest in other possible CCS boards?
Click to expand...

This is still a super project, since the rest of us sell boards that incorporate it in other stuff. These are the straight CCS boards that will fit most anywhere and is the ultimate for upgrades on older equipment, as well as new designs.

Cheers!
 
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